Date: Mon, 3 Feb 2003 02:22:12 -0800 (PST) From: "Andrey A. Chernov" <ache@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/lib/libc/stdlib rand.c random.c Message-ID: <200302031022.h13AMC8D026202@repoman.freebsd.org>
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ache 2003/02/03 02:22:12 PST
Modified files:
lib/libc/stdlib rand.c random.c
Log:
Park & Miller PRNG can be safely initialized with any value but 0 and stuck
at 0 as designed. Its BSD adaptation tries to fight it by mapping 0 to
2147483647 after calculation, but this method not works since 2147483647
seed returns to 0 again on the next interation. Instead of after calculation
mapping, map 0 to another value _before_ calculation, so it never stucks.
Revision Changes Path
1.12 +4 -1 src/lib/libc/stdlib/rand.c
1.21 +4 -1 src/lib/libc/stdlib/random.c
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